Rocks often develop cracks when they are exposed to?

Rocks often develop cracks when they are exposed to compression and tension. Compression occurs when rocks are pushed together, while tension occurs when rocks are pulled apart. Both of these forces can cause rocks to develop cracks, which can vary in size and orientation depending on the type of force applied and the properties of the rock. Additionally, joints and faults can also contribute to the development of cracks in rocks. Joints are natural fractures that occur in rocks, often as a result of tectonic movements or other stresses. Faults are more significant fractures in the Earth's crust that result from the movement of tectonic plates. Both joints and faults can create pathways for water and other materials to penetrate rocks, further contributing to their weathering and erosion. Overall, it is the combination of compression and tension, as well as other geological processes such as jointing and faulting, that can cause rocks to develop cracks over time.